Feedeeick wikofp woodhull



(Model.)

F. W. WOODHULL.

COMBINED GAEEPEES, PEOTEAGTOE, AND BEVEE.

Patented Aug. 25, 1885.

fig/.1'.

Jim/w ATTORNEYS.

WITNESSES "NrTnn STATES PATENT Ormea.

FREDERICK VIKOFF VVOODHULL, OF LINCOLN UNIVERSITY, PA.

COMBiNED CALIPER, PROTRACTOR, AND BEVEL.

SPOEFCATION forming part of Letters Patent No. 325,036, dated August 25, 1885.

(Model To all whom t may concern:

Be it known that I, FREDERICK Winona W ooDHULL, of Lincoln University, in the county of Chester and State of Pennsylvania, have invented a new and Improved Combination-Tool for Measuring, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved combination-tool for measuring, and which is so constructed that it can be used as a rule, a square, a bevel, a protractor, an inside or outside caliper, and as a depthgage.

rlhe invention consists of three graduated arms pivoted together, of a protractor, and of a caliper-arm.

The invention also consists of various parts and details, hereinafter more fully set forth and described.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the gures.

Figure 1 is a face view of my improved combination tool, showing the caliper-arm attached. Fig. 2 is a rear face view of my improved eombinatioirtool, showing the same for measuring angles; and Fig. 3 is a vertical cross-section on the lines x a". of Fig. 1.

The arm A is provided on its face with the graduation a, and has the protractor B formed on one end. Through the center of the protractor B passes the thumb-screw C, on which is placed one end of the arm D, the other end of arm Dbeing attached to the pointer E, riveted to the arm A on the opposite end from the protractor B. The arm D is provided on its outer face with the graduation I), representing inches and subdivisions. On the thumb-screw C,and between the arms A and D, is placed the arm F, having the graduations c and d on its front and rear faces, respectively, and is provided with the pointer G, which indicates on the graduation e, representing degrees and subdivisions on the protractor B.

The caliper-arm H has the right-angular arm H, which is provided with the slot I and the groove I', which can be placed over the arm F and held rigid on the same by means of the thumb-screw J. The caliper-arm H stands with its upper edge, Hi, at right angles to the arm F, when placed on the latter, as shown in Fig. l.

The outer end of the caliper-arm H is provided with the point K, and the angular arm H is provided on its face with the mark L, to read the measurement of the inside caliper.

The combination-tool can be used when the caliper-arm H is detached as a common rule, by turning the arm Fin an opposite direction from the arms A and D, and fastening the three arms together in this position by the thumbscrew C. The graduations c and Z) indicate a continuous measure fromone end to the other, 011e foot, as shown partly in dotted lines in Fig. 2.

To measure bevels itis necessary to place the arm F and the arms A and D on the bevel t0 be measured, and the pointer G will indicate the degrees and subdivisions on the protraetor B.

A square can be formed by setting the arm F at right angles to the arms A and D and then tightening the thumb-screw C.

In order to use the combination-tool as inside or outside calipers, the arm F is set at right angles to the arms A and D and held in this position by tightening the thumb-screw C. Then the caliper-arm H is placed on the arm F, as shown in Fig. l, and can be fastened to the arm F by tightening the thumbscrew J. The tool can now be used as an inside or an outside caliper by moving the arm H 011 the arm F. The outside caliper is taken between the lower edges of the arms A andD and the upper edge, H, of the arm H, and the measurement is read on the graduation d ou arm F at the point N on the upper edge of the arm H. The inside caliper is taken between the point E on the arm A and the point Kon the arm H, and the measurement is read on the graduation d on arm F, at the mark L on the right-angular arm H.

The combination-tool can be used as a depthgage by placing the caliperarm in a reversed position on the arm F, so that the edge H2 of arm H is downward and indicating the depth measured on arm F on the graduation C.

VVheu the caliper-arm H is detached from the arm F, the latter can be folded between the arms A and D,as shown in dotted lines in Fig.l.

ICO

The combination-tool can also be used for making parallel lines between the arms A and D and the arin H by adjusting the lat-ter on the arm F.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the arni A, provided With the right-angular point E on its outer end, and bhe graduated arm F, pivoted thereto, of the caliper arm H, having the straight upper edge, H2, and provided with the right-angular point K at its outer end, and with the Socket-ed angular arm H', having the niark L, the said caliper arm being adjustably secured to the graduated arm, substantially as herein shown and described.

2. In a combination-tool for measuring the combination of the graduated arm A, the protraotor B, the thumb-Screw C, the graduated ari'n D, the point E, the graduated arm F, the pointer G, the caliper-arm H,tl1e right-angular arin H', having bhe groove I and the slot I, the thumb-screw J, the point K, and the mark L, all arranged and operating substantially as shown and described.

F REDERICK WIKOFF WOODIIULL.

XVitiiesses:

L. D. HU'roHIsoN, F. C. HUTCHISON. 

